for(Visit visit:currentVisits){
                    if(timeAndDateOfVisit.isAfter(visit.getEndOfVisit())){
                        flag = false;
                    }else if(timeAndDateOfVisit.isBefore(visit.getEndOfVisit())){
                        if(addedTime == "1 Hour"){
                                    if(timeAndDateOfVisit.plusHours(1).isBefore(visit.getDateOfVisit())){
                                        flag = false;
                                    }
                        }else if(addedTime == "3 Hour"){
                                if(timeAndDateOfVisit.plusHours(3).isBefore(visit.getDateOfVisit())){
                                    flag = false;
                                }
                        }else{
                                if(timeAndDateOfVisit.plusMinutes(15).isBefore(visit.getDateOfVisit())){
                                    flag = false;
                                }
                        }
                    }
                }